Accurately characterizing such materials and structures can be a challenge. Standard measurement techniques, usually based on strain gauges, provide only limited and local information. The rapid development of digital camera technology in combination with high performance digital image correlation (DIC) techniques is currently bringing about change in this field.

Thanks to DIC, it is now possible to extract full field 3D geometry, displacement, strain and acceleration, under any load and for almost any type of material, with limited instrumentation. The technique is useful for measuring the strain of materials and structures under static and quasi-static loading. The DIC is also applicable to dynamic measurements and has recently been extended to deal with vibration measurements and modal testing of structures.

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